ultrasn0w, the only program developed by the Dev Team to unlock iPhone 3G, iPhone 3GS and iPhone 4 baseband got a new update. Latest update brings ultrasn0w to version 1.2.8 and make it compatible with iOS 6.1.
MuscleNerd has confirmed on Twitter today that ... ...

MuscleNerd released an official statement regarding iPhone unlock. iPhone Dev team postponed the release of ultrasn0w unlock until Apple releases iOS 4.3 or iOS 4.2.5 Sherif Hashim found an exploitable baseband crash that could

Apple released the iPhone Software update OS 3.1.3, the latest firmware update contains a baseband firmware update 05.12.01 like firmware 3.1 and it’s is not compatible with Ultrasn0w. Means if you upgrade your iPhone

As promised Musclenerd showcased the next version of QuickPwn and UltraSn0w. Yes UltraSn0w replaced the YellowSn0w for iPhone 2G, 3G with OS 3.0 DevTeam will release UltraSn0w for iPhone 3G on iPhone OS 3.0